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Finding the Fourth Proportional to 36,987.48, 55,487.25 and 20,355.30

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Solution

The fourth proportional to 36,987.48, 55,487.25 and 20,355.30 is: 30,536.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,987.48 : 55,487.25 = 20,355.30 : x
  2. Step 2: Convert to fraction form
    36,987.48/55,487.25 = 20,355.30/x
  3. Step 3: Cross multiply
    36,987.48x = 55,487.25 × 20,355.30
  4. Step 4: Simplify right side
    36,987.48x = 1,129,459,619.93
  5. Step 5: Solve for x
    x = 1,129,459,619.93/36,987.48
  6. Step 6: Final answer
    x = 30,536.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.